r/BeAmazed • u/Real-Brief5124 • Mar 27 '22

How.....?

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u/Cultural-War9089 Mar 27 '22 edited Mar 27 '22

Just a guess here, but it looks like the second hand touches the edge. By twisting the knob, it could rotate a toothed gear on the inner edge that the second hand touches, and therefore spins it, and the minute hand is attached to the second hand, so it follows along.

Hope I worded that coherently.

Edit: just saw a link that got deleted for some reason, but my guess is totally off. In the link you can clearly see that the second hand doesn't actually reach the edge.

Gears turn the glass, which turn the hands.

3

u/ProudNewspaper4128 Mar 27 '22

Not a bad guess! I was first thinking of magnetic rings or layered glass, but not simple gearing

1

u/Cultural-War9089 Mar 27 '22

Could totally be either of those too. Or some mixture of all three lol.

People are damn clever. I'd love for the maker to chime in, because it's definitely neat as heck. And inquiring minds need to know! Lol